Ada Lovelace, mother of computer programming, was a gifted mathematician who worked with Charles Babbage to create instructions for his "Analytical Engine" (a precursor to the modern computer). Born in 1815, she wrote extensive notes for Babbage's paper, including a fundamental insight that the Analytical Engine, "might act upon other things besides number." Ada envisioned using the computer in ways even Babbage hadn't dreamed of, and is now widely considered to be the world's first computer programmer.
In celebration of Ada, and of women in computer science, we have designed a pendant with Ada's portrait on one side and her calculations on the other. Using hand-weathered lead-free, nickel-free pewter and glass domes, the pendant measures a bit over 1 inch in diameter and hangs on a steel chain. You may choose the chain length: long (24" - good for wearing over shirts and sweaters), or short (18" - good for showing off the pendant on the chest). The pendant is water-resistant, but not water-proof.